Improvement in machines for casting metals



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J. B. McCUNE. I

v MACHINE FOR CASTING METALS.

i No.172,044. Patented Jan. 11, 187-6 u lnueuton gfiii;

. .PEfESiS, PNDTO-LIYHOGRAPHERQ WASHINGTON D G.

, Z Sheets-SheetZ J. B'. McCUNE. MACHINE Eon cAsTITNG METALS. vNo.172,044. Patented Jan.1 1,1B76.

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UNITED STATES PATENT Orrron JOSEPH B. MOCUNE, OF HAMILTOLT, CANADA,ASSIGNOR OF ONE-HALF HIS RIGHT TO RICHARD MOTT WANZER, OF SAME PLACE.

IMPROVEMENT IN MACHINES FOR CASTING METALS.

Specification forming part of Letters Patent No. 1 72.044, dated January11, 1876; application. filed April 2, 1875.

To allwhom it may concern Be it known that I, J osErH BURT MoOUNE, ofthe city of Hamilton, in the county of Wentworth,in the Province ofOntario, Dominion of Canada, have invented a Combined Ramrningand'Molding Machine for Metal Castings; and I do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same.

. Referring to. the accompanying drawings, Figure 1, Sheet 1, is a frontview of the machine. Fig. 2, Sheet 1, is a top view of the same. Fig. 3,Sheet 2, is a side view of the machine. Fig. 4, Sheet 2, represents atop view, showing the pattern in the flask, and the swinging bracketswung round to the hack of the machine.

. A represents the base of the machine. B B are two grooved. uprightstandards, properly secured to the said base. C C is a movable slidingframe, composed of upright and cross pieces. 0 c are the upright parts,which slide in the grooves of the standards. C C are the cross-pieces,and'D D are the short uprights, to which the plate E is secured. Thisplate is made fast to the movable frame, but at the same time isadjustable, so that it may at any time be easily removed and replaced byanother and similar one, but for a different It is arranged and fastenedas follows: There are two latches, P P, properly secured to the twosides. respectively, of the said plate E, as partially shown in Fig. 3,Sheet 2, which, when turned inward against the under side of the curvedupright supports D D, firmly hold the said plate in proper position. Italso receives the additional security of the use of two dowel-pins madeto pass through it into the uprights D D. F is a movable plunger in thecenter of the machine, made to slide through openings cut in thecross-pieces C and C audit is made to move vertically independent of themovable sliding frame 0 C. On its extreme top is fastened a flat plate,G, upon which is secured. in proper position one half of a splitpattern, H, to

mold, or it may be in some cases a whole pat- I tern. If thepattern isto be drawn in halves,

then one half of the pattern is secured to the said plate. If a patternis not drawn or molded in halves, then the whole pattern is fastened toit. I represents one half of a flask placed upon the top of thepattern-plate E, and made to surround the pattern, when it is ready tobe molded. The cope of the flask is kept in its position from movingfrom side to side by means of the ordinary flask-pins entering holes tocorrespond in the plate E on one machine, and the eyes on the nowel orother half of the flask are made for pins to enter, which are set in theplate of another and similar machine. J is a handlever, one end attached to a projection, K, said projection be ing. affixed to one of theuprights of the frame 0. It is also attached by a screw or pin to theupright plunger F at the point 01, and its extreme upper end is held inits place by the catch L, as shown in Fig. 1, the machine then being inthe position ready for the operation of molding. By releasing the saidlever from the catch L, the whole of the frame, composed of the piecesheretofore mentioned, slides down ward in the grooves of the standards,and, by the same movement, draws the pattern downward from and out ofthe sand in the flask I. L is an upright rod or post affixed to thebrace A, and is supported by the arch M, said arch being secured to thestandards B B. It is also further securely fixed in position by means ofthe plate N. The principal object of the said rod is to carry a swingingbracket, 0, which is for the purpose of ramming or packing the sand inthe flask. It consists of a frame provided with two lugs, e 6, throughwhich holes are drilled for the said rod L to pass through. lts lowerportion consists of a plate, 0, which is made a trifle less than theinside of the flask. P P are latches, fastened to the under part of theplate E, and are for the purpose of securing the said plate to theuprights D D.

The object of constructing the said latches in this manner is to afforda convenient and quick method of removing the plate E, so astosubstitute another of different design and pattern, as each patternrequires a plate constructed for itself. An opening in the plate is madeto correspond exactly with the form of the pattern, which is made topass through the said opening as far as necessary, as will be explainedhereinafter.

. Q is a horizontal rocker-bar, resting in grooves ff on the sides ofthe base A, and is provided with'two projecting points, b b, firinlyaffixed thereto. R R are two rods, the base of each being hollowed orcapped out, and made to rest upon the points b b. The upper ends of saidrods are pointed, and are made to pass into openings on the under sideof the lower cross-piece of the sliding frame. By this means aconnection is formed with the rocker-bar and the sliding frame, forpushing it .up when the sand, is to be rammed in a flask. This is doneby means of the hand-lever S on the right side, which, is attached tothe end of the rocker-bar.

, By moving the said lever forward, an upward movement is given theprojecting points b b, and through them to the rods R R, which raise thewhole sliding frame 0, with the flask, up against the rammer 0, when thesand is to be packed in the flask. g p T T are the upright grooves cutin the standards B B, into which the frame 0 slides. The operation ofthe machine is as follows: The lever J is raised and locked on the latchL, which brings the pattern Hup through its corresponding opening cut inthe plate E, of the same size and shape as the pattern, and closely.fitting it. One half of the flask I is then placed upon the plate E, andsecured in position by means of the flask-pins entering holes made inthe proper place in the said plate E. The flask is then filled withloose sand, and struck ofi level with the top of the flask. A bottomboard, which is made to fit the inside of the flask, is then placed uponit, and the swinging bracket 0, which has been swung out of the way ofthe flask, as shown in Fig. 4, is then brought round into positionimmediately over the center of the flask. The operator then grasps thehandle of the lever S and draws it forward, which produces the efiect ofraising the whole frame, flask,'and sand up against the swinging bracket0, and thereby pressing the sand sufficiently firm in the flask andaround the pattern as well as, if not better than, when done in theordinary way by hand. In fact, I think the work is preferable to thatdone by hand, as the sand in the flask is pressed by an equal anduniform upward pressure, which packs the sand closely around the patternwhere it is wanted, whereas by handramming, in the ordinary way, thesand is apt to be packed loosely at the pattern and too solid at the topof the flask-a condition of things which will produce rough-edgedcastings, and ought, by all means, to be avoided.

The next operation is to draw the pattern from the sand, which is easilyand correctly molded in another and similar machine, oper-.

ated in the same way. The two halves are then placed together, thesprues removed, and gutters cut, as is usual in the ordinary method ofmolding, and clamped, when the flask is then ready to receive the moltenmetal.

It will be observed that I construct the-pattern-plates E in such amanner that when the two halves of the molds are placed together theedges of both come perfectly true and correct, and will produce castingsso smooth that'the parting-edge will not be visible upon them, and themanner I construct said pattern-plates may be described as follows: For

half-patterns, forming the mold in two parts, the first operation is toplane the surface of each plate true and parallel. They are then placedtogether, and holes drilled through both for guide -pins for the flask,in any required position to suit the size of the flask. They are thenpinned together, and the form of the pattern is then worked out throughboth plates alike, while they are so bound and held together that theopenings are made exactly the same size and form in each, so thatalthough the two halves are molded on separate machines, when they areplaced together they are a perfect match, and come out right with everyoperation. 1

The advantages of the draw part of the machine-that is, drawing thepattern downward from the sand-are producing a mold that is the exactsize and form of the pattern, as it is done without rapping or looseningthe pattern; and the ramming part is for produc-' ing an equal anduniform packing or ramming of the sand in the flask. A large percentageof time is saved by the operation; and, further, the work of moldingwith my combination machine, as just described, does not require skilledlabor, and the quality of castings is as-good as, if not better than,those produced by the best skilled hand-labor in the ordinaryway ofmolding.

What I' claim as my invention is 1. In a machine for molding metalcastings,

a vertically-sliding frame carrying a top-plate, v

E, and a flask, I, and a verticallymovable plunger for carrying thepattern, and a rammer arranged 'above the flask, the whole constructedsubstantially as described, whereby the sliding frame and flask can beforced upward against the rammer for ramming the sand in the flask,andafter the sand isrammed the plunger and pattern can be moved downward independent of the frame and flask, to'

remove the pattern, as set forth.

2. The combination, with a molding-flask constructed to have a verticalmovement imand the sliding frameG C, substantially as and,

parted to it, of a swinging rammerbracket for the purpose described.arranged upon a vertical standard, for press- Dated at Hamilton, Canada,this 18th day .ing the sand when the flask is raised, substanofFebruary, A. D. 1875.

tiallyas described. JOSEPH BURT MGGUNE.

3. The combination of the upright rod L, Signed in presence of havingthe collars a a, the swinging bracket WM. BRUCE, or rammer 0, arrangedbetween said collars, 1?. LE; SCRIVEN.

